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BEGIN:VEVENT
DTSTAMP:20260910T024743Z
LAST-MODIFIED:20180312T133034Z
DTSTART:20180319T163000Z
DTEND:20180319T173000Z
UID:event1890@bu.edu
URL:http://physics.bu.edu/internal/events/show/1890
SUMMARY:"The fate of microbial invaders in multi-stable laboratory ecosyste
	ms"
DESCRIPTION:Featuring Daniel Amor\, Massachusetts Institute of Technology\n
	Hosted by: Kirill Korolev\n\nPart of the Biophysics Seminars.\n\nMicrobial 
	communities are frequently challenged by the arrival of new species that co
	uld spread in the community\, potentially leading to long-term shifts in co
	mmunity state. This argues for a deeper understanding of how invasions can 
	interfere with the dynamics of microbial communities. In this talk I will s
	how different community dynamics scenarios resulting from microbial invasio
	ns observed in laboratory ecosystems. Firstly\, I will analyze the spatial 
	dynamics of bacterial mutualists to show that\, while invading new territor
	ies\, improved environments can slow down the speed of the range expansion.
	 Moreover\, I will cover more complex situations in which an interaction ne
	twork considering two alternative mutualistic mechanisms (here\, cross-feed
	ing and cross-protection) maintains a high biodiversity at the edge of the 
	front. I will then focus on a bistable model system to study the dynamics b
	etween alternative stable states in microbial ecosystems. By introducing an
	 invading species into the system\, we observed that the invading species c
	an induce transitions between these alternative stable states. Interestingl
	y\, in many cases the invading species did not survive in the final communi
	ty state\, making these species what we call a "transient invader." This su
	ggests that short-term invasions (such as infections) could be a common mec
	hanism driving transitions between stable states in microbial communities.
LOCATION:SCI 352\, 590 Commonwealth Avenue\, 02215
STATUS:CONFIRMED
CLASS:PUBLIC
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